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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Fabrication of a terahertz quantum-cascade laser with a double metal waveguide based on multilayer GaAs/AlGaAs heterostructures
The Postgrowth processing of GaAs/AlGaAs multilayer heterostructures for terahertz quantumcascade lasers (QCLs) are studied. This procedure includes the thermocompression bonding of In–Au multilayer heterostructures with a doped n{sup +}-GaAs substrate, mechanical grinding, and selective wet etching of the substrate, and dry etching of QCL ridge mesastripes through a Ti/Au metallization mask 50 and 100 μm wide. Reactive-ion-etching modes with an inductively coupled plasma source in a BCl{sub 3}/Ar gas mixture are selected to obtain vertical walls of the QCL ridge mesastripes with minimum Ti/Au mask sputtering.
A Novel Waveguide Concept for Ultrasonic Thermometry Applications
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Efficient C-band single-photon upconversion with chip-scale Ti-indiffused pp-LiNbO 3 waveguides
Not Available
Optimization of Si-Photonics Compatible AlN waveguides for Integrated Nonlinear Optics Applications.
Abstract not provided.
Guiding of Spectroscopic Signal with a Concatenated Filament-driven Waveguide
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Optimization of Optical Forces in Nanoscale Photonic Waveguides via Dispersion Engineering.
Abstract not provided.
Thermal and Loss Characterization of Mechanically Released Whispering Gallery Mode Waveguide Resonators.
Abstract not provided.
Design of folded hybrid silicon carbide-lithium niobate waveguides for efficient second-harmonic generation
Not Available
Propagation and absorption of light in planar dielectric waveguides with two-dimensional semiconductors
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Optical diagnostic methods for monitoring the poling of thin-film lithium niobate waveguides
Not Available
Inverse design optimization for efficient coupling of an electrically injected optical antenna-LED to a single-mode waveguide
Not Available
Parallel-plate waveguides for terahertz-driven MeV electron bunch compression
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Gamma radiation effects on passive silicon photonic waveguides using phase sensitive methods
Not Available
32 Gbps heterogeneously integrated quantum dot waveguide avalanche photodiodes on silicon
We report a heterogeneous GaAs-based quantum dot (QD) avalanche photodiode (APD) on silicon with an ultralow dark current of 10 pA at − <#comment/> 1 V , 3 dB bandwidth of 20 GHz and record gain-bandwidth product (GBP) of 585 GHz. Furthermore, open eye diagrams up to 32 Gb/s are demonstrated at 1310 nm. The k-factor has been measured for these devices to be as low as 0.14. A polarization dependence on gain and bandwidth has been observed and investigated. This shows the potential to integrate a high-speed receiver in a wavelength division multiplexing (WDM) system on a QD-based silicon photonics platform.